In the customization tab, you are able to select the background and text colors. The above screenshot shows default colors.
Header Background and Text Colors
Color for the widget's header
Body Background and Text Colors
color of the main body of the widget
Calendar Image/Icon Color
Customize the calendar color in the header. If you choose to display a font awesome icon, you can change the color of that icon here as well.
Footer Background and Text Color
Color of the footer area
Open/Closed Badge Color
You can change the open and closed badge color. The text color is set to white by default.
Check the demo Please check the demo to see how these colors are used.